Replacable debrider blade module with latching mechanism

ABSTRACT

A blade assembly comprising: a tip including two or more tubes, wherein the two or more tubes include at least: an outer tube and an inner tube; and a mechanical enclosure including: a locking spline having a longitudinal axis; and a slide lock; wherein the slide lock slides along the longitudinal axis of the locking spline and over the locking spline forming a locked state so that rotational movement of the locking spline, around the longitudinal axis of the locking spline, is prevented; and wherein the outer tube is coupled to the locking spline so that rotational movement of the outer tube, around the longitudinal axis of the locking spline, is prevented during the locked state.

FIELD

The present teachings generally relate to a debrider blade module, andmore specifically a debrider blade module with locking part so thatrotation of blades of the blade module can be restricted and/orprevented.

BACKGROUND

Generally, debriders include a handpiece and a cutting portion. Thehandpiece includes a motor that rotates one or more rotating portions inthe cutting portion. The cutting portion includes a cutting window wherethe cutting window exposes a cutting blade and/or the cutting portion isangled. During use the cutting window and/or the angle of the cuttingportion can be oriented by rotating the entire handle. In someinstances, the entire cutting portion may be removed from the handpiecerotated and put back in the handpiece so that the cutting window and/orthe angled portion is oriented as desired.

Additionally, some handpieces include a rotary knob that may be used torotate the cutting portion from the handpiece. During use the handpiecemay increase in temperature and one or more of the components of thehandpiece may thermally expand. The expansion rates of the variouscomponents may inhibit movement of the rotary knob so that the rotaryknob is difficult to use and/or has limited function. After use, thehandpiece and the rotary knob may be placed in an autoclave so that thehandpiece is sterilized and subsequently placed in a fluid for rapidcooling. However, the repeated heating and cooling of the handpiece androtary knob may degrade the rotary knob so that the connection betweenand the cutting portion and the rotary knob slips and/or sticks so thatrotation of the cutting portion is inhibited. In another example,repeated cleaning and/or poor cleaning techniques of the device mayresult in a buildup of material in the device so that the built-upmaterial inhibits proper function of the rotary knob.

Examples of some surgical instruments may be found in U.S. Pat. Nos.5,112,299; 5,376,078; 5,492,527; 5,540,708; 5,609,573; 5,620,447;5,873,886; 6,494,892; 7,247,161; 8,109,956; 8,202,288; U.S. PatentApplication Publication No. 2002/0038129; 2004/0243163; 2005/0277970;2010/0298763; and 2012/0221035 all of which are incorporated byreference herein for all purposes. It would be attractive to have arotation device that is connected to the cutting portion. It would beattractive to have a locking portion that locks the rotating portion sothat when the cutting portion is in use the cutting portion does notrotate. It would be attractive to have a nosecone that rotates an outertube, an intermediate tube, or both of the cutting portion so that thecutting window and/or the angle portion is rotated.

SUMMARY

The present teachings meet one or more of the present needs byproviding: a blade assembly comprising: (a) a tip including two or moretubes, wherein the two or more tubes include at least: (i) an outer tubeand (ii) an inner tube; and (b) a mechanical enclosure including; (i) alocking spline having a longitudinal axis; and (ii) a slide lock;wherein the slide lock slides along the longitudinal axis of the lockingspline and over the locking spline forming a locked state so thatrotational movement of the locking spline, around the longitudinal axisof the locking spline, is prevented: and wherein the outer tube iscoupled to the locking spline so that rotational movement of the outertube, around the longitudinal axis of the locking spline, is preventedduring the locked state.

Another possible embodiment of the present teachings comprises: a bladeassembly comprising: (a) a tip including three or more tubes, whereinthe three or more tubes include at least: (i) an outer tube; (ii) aninner tube; and (iii) an intermediate tube located at least partiallybetween the inner tube and the outer tube; and (b) a mechanicalenclosure including: (i) a nosecone having a nosepiece gear; and (ii) acollet having one or more pinion gears that are in communication withthe nosepiece gear, wherein the intermediate tube is connected to anouter hub that extends though the collet, the outer hub including atoothed portion that is in communication with the one or more piniongears so that rotation of the nosecone causes rotation of theintermediate tube.

Another possible embodiment of the present teachings comprises: a bladeassembly comprising: (a) a tip including two or more tubes, wherein thetwo or more tubes include at least: (i) an outer tube; (ii) an innertube; and (b) a mechanical enclosure including: nosecone having arotational axis; wherein the outer tube is connected to the nosecone sothat rotation of the nosecone causes rotation of the outer tube.

The teachings herein provide rotation device that is connected to thecutting portion. The teachings herein provide a locking portion thatlocks the rotating portion so that when the cutting portion is in usethe cutting portion does not rotate. The teachings herein provide anosecone that rotates an outer tube, an intermediate tube, or both ofthe cutting portion so that the cutting window and/or the angle portionis rotated.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates a view of a blade assembly with a straight tip;

FIG. 2 illustrates a view of a blade assembly with an angled tip;

FIG. 2A illustrates an exploded view of one embodiment of the angled tipof FIG. 2 with the blade tip in a locked position

FIG. 2B illustrates an exploded view of one embodiment of the angled tipof FIG. 2 with the blade tip in an unlocked position;

FIG. 3 illustrates an angled tip;

FIG. 3A illustrates an exploded view of one embodiment of the angled tipof FIG. 3 with the blade tip in a locked position

FIG. 3B illustrates an exploded view of one embodiment of the angled tipof FIG. 3 with the blade tip in an unlocked position;

FIG. 4 illustrates an exploded view of a blade assembly having threetubes;

FIG. 5 illustrates an perspective view of an exploded mechanicalenclosure;

FIG. 6 illustrates a front perspective view of an exploded mechanicalenclosure:

FIG. 7 illustrates an exploded view of a nosecone;

FIG. 8 illustrates a nosecone connected to an outer hub;

FIG. 9 illustrates a nosecone and collet;

FIG. 10 illustrates a perspective view of a collet;

FIG. 11 illustrates a perspective view of the tears of the teachingsherein;

FIG. 12 illustrates a nosecone;

FIG. 13 illustrates a locking spline; and

FIG. 14 illustrates a locking spline and slide lock.

DETAILED DESCRIPTION

The explanations and illustrations presented herein are intended toacquaint others skilled in the art with the teachings, its principles,and its practical application. Those skilled in the art may adapt andapply the teachings in its numerous forms, as may be best suited to therequirements of a particular use. Accordingly, the specific embodimentsof the present teachings as set forth are not intended as beingexhaustive or limiting of the teachings. The scope of the teachingsshould, therefore, be determined not with reference to the abovedescription, but should instead be determined with reference to theappended claims, along with the full scope of equivalents to which suchclaims are entitled. The disclosures of all articles and references,including patent applications and publications, are incorporated byreference for all purposes. Other combinations are also possible as willbe gleaned from the following claims, which are also hereby incorporatedby reference into this written description.

The teachings herein provide a debrider and preferably a microdebrider.The debrider generally includes a handpiece and a separable bladeassembly. The handpiece includes an aperture that receives a portion ofthe blade assembly so that the handpiece may drive the blade assemblyduring use. The handpiece may include a motor and one or more gears thatdrive one or more rotary cutting tubes of the blade assembly. Otherteachings of the handpiece may be gleaned from the teachings hereinincluding those of paragraph Nos. 6-8, 26-45, 061-062, 065, and 70-72and FIGS. 1-3 of U.S. Patent Application Ser. No. 61/731,919 filed onNov. 30, 2012 teaching a handpiece and one or more connection portionsfor driving the separable blade assembly. The blade assembly wheninstalled in the handpiece may form a fixed connection so that the bladeassembly does not rotate independently of the handpiece. The handpieceand blade assembly may be separable so that the handpiece, the bladeassembly, or both may be cleaned, disposed, or both after use.

Preferably, the blade assembly may be disposable. The blade assemblyincludes a tip and a mechanical enclosure. The tip may include one ormore tubes and preferably two or more tubes. The one or more tubes maybe made of any biocompatible material. The one or more tubes may be madeof a material that may be used to perform surgery. The one or more tubesmay be made of any material that is sufficiently rigid to performsurgery: to be push, pulled, angled, or a combination thereof withoutbending, breaking; or both. The one or more tubes may be made of apolymer, metal, a natural material, a synthetic material, or acombination thereof. Preferably, the one or more tips are made ofstainless steel or a surgical steel. The tip may include at least anouter tube and an inner tube. The tip may include an outer tube, anintermediate tube at least partially disposed within the outer tube, andan inner tube at least partially disposed within the intermediate tubeand the outer tube. Each of the two or more tubes may be connected.Preferably, each of the two or more tubes is axially independent of eachother so that one or more of the tubes may rotate without rotating theother tubes. For example, an inner tube, an intermediate tube, or bothmay rotate inside of the outer tube. The one or more tubes may bestraight, angled, bent, curved, flex-jointed (e.g., if the outer tube isbent then inner tube may be flexible to rotate within the outer tube),or a combination thereof. The one or more tubes may form one or moreangles and the one or more angles may be any angle or combination ofangles, include an angled portion, or both. The angled portion may be arigid bend, an arcuate bend, a sweeping curve, or a combination thereof.The one or more tubes may have an angled portion that forms an angle ofabout 0 degrees or more, about 15 degrees or more, about 30 degrees ormore, about 45 degrees or more, about 60 degrees or more, or about 90degrees or more. The one or more tubes may have an angled portion thatforms an angle of about 150 degrees or less, about 135 degrees or less,about 125 degrees or less, or about 105 degrees or less. Thus, forexample in a multiple tube design the outer tube and the inner tube mayboth be straight and/or angled.

The outer tube may be a sheath that houses all or a portion of an innertube, an intermediate tube, or both. The outer tube may be any tube thatforms an outer surface of the tip so that a fluid, surgical debris,irrigation fluids, or a combination thereof may pass through the outertube to and/or from a site of interest. The outer tube may be any shape,size, configuration, or a combination thereof so that the outer tubeassists in protecting the inner tube, the intermediate tube, or both.The outer tube may be of any size and shape so that the outer tube maybe useful for surgery and preferably for minimally invasive surgery. Theouter tube may be sufficiently sized so that that one or more tubes mayfit within the outer tube and so that a fluid, surgical debris,irrigation fluids, or a combination thereof may pass through the outertube to and/or from a site of interest. The outer tube includes an innerdiameter and an outer diameter. The inner diameter may be sufficientlysized so that one or more and preferably two or more tubes may fitwithin the inner diameter of the outer tube and fluid, surgical debris,irrigation fluids, or a combination thereof may pass through the outertube to and/or from a site of interest. The inner diameter may be about1 mm or more, about 2 mm or more, or about 3 mm or more. The innerdiameter may be about 7 mm or less, about 6 mm or less, or about 5 mm orless. The outer diameter may be about ±0.0.1 mm about ±0.5 mm, or about±1.0 mm of the inner diameter. The diameter of the outer tube may besufficiently sized so that the outer tube may include an angled portion.

The outer tube may determine the angle of the angled portion of theinner tube, the intermediate tube, or both as discussed herein for theangle of the tip. The outer tube may be rotatable around its ownrotational axis, a longitudinal axis of a locking spline, or acombination thereof. The outer tube may be rotatable and/or revolvedaround a portion of its own longitudinal axis. For example, the outertube may be bent and a longitudinal axis of the outer tube may followthe bend of the outer tube, and the outer tube may rotate around thelinear portion of the longitudinal axis so that the bend in outer tubemay be rotated from a first position to a second position. The outertube may be rotatable around a longitudinal axis of the mechanicalenclosure, an axis parallel to the longitudinal axis of the mechanicalenclosure, or a combination thereof. The outer tube may include one ormore slots.

The one or more slots may be located at any location along the outertube so that the outer tube forms a fixed connection with the nosecone,the locking spline, or both. Preferably, the outer tube includes one ormore slots at a proximal end (i.e., an and proximate to the user, withinthe mechanical enclosure, or both). The slots may be an absence ofmaterial, a cut, a slit, a bend, a taper, a flared portion, or acombination thereof. Preferably, the outer tube includes two slots on anend that is adjacent to the nosecone so that the outer tube may befixedly secured to the nosecone, the outer tube may be fixedly connectedto a locking spline, or both. The one or more slots of the outer tubemay be connected to the locking spline so that a cutting window in theouter tube, a cutting window in the intermediate tube, or both may berotated around the longitudinal axis of the outer tube, the longitudinalaxis of the intermediate tube, or both as discussed herein.

The outer tube may include a cutting window. The cutting window may be awindow that exposes all or a portion of a distal end of the inner tube,all or a portion of a distal end of the intermediate tube, or both sothat during use the inner tube rotates and forms a cutting surface forperforming a surgery. The outer tube may be free of a cutting window.The outer tube may include an open end so that all or a portion of theinner tube, an intermediate tube, or both extends out of the open end.The open end, the cutting window, or both may include a taper thatreduces the diameter of the outer tube. The open end, the cuttingwindow, or both may form a snug connection, a journalled connection, aninterference fit, a friction fit, or a combination thereof with theintermediate tube, the inner tube or both, so that the inner tube, theintermediate tube, or both are prevented from moving axially towards thedistal end of the tip, moving laterally, or both, but the inner tube,the intermediate tube, or both may rotate around a longitudinal axis ofthe outer tube.

The intermediate tube may extend through all or a portion of the outertube. The intermediate tube may extend all of the way through one orboth ends of the outer tube. The intermediate tube may include a windowfor exposing all or a portion of an inner tube. The intermediate tubemay include an open end so that the inner tube may extend out of theintermediate tube. The window of the intermediate tube, the outer tube,or both may be sufficiently large so that a sufficient amount of theinner tube may be exposed for debriding (e.g., cutting, shaving,smoothing, removing, the like, or a combination thereof). The window ofthe intermediate tube, the outer tube, or both may be sufficiently smallso that the device may be used for minimally invasive debriding. Thewindow of the outer tube, the intermediate tube, or both may besubstantially the same size. The window of the intermediate tube, theouter tube, or both may be located in a distal end region of the tip(e.g., a region of the tip proximal to a patient and distal from theuser). The window of the intermediate tube, the outer tube, or both mayextend around about 15 degrees or more, about 30 degrees or more, about45 degrees or more, about 60 degrees or more, about 90 degrees or more,about 115 degrees or more, about 135 degrees or more, or about 150degrees or more. The window of the intermediate tube, the outer tube orboth may extend around about 300 degrees or less, about 270 degrees orless, about 235 degrees or less, or about 200 degrees or less. The innertube may have a cutting surface that is substantially the same size asthe window so that the cutting window and the cutting surface of thecutting window form two opposing cutting portions that assist indebriding.

The inner tube may extend through all or a portion of the intermediatetube, the outer tube, or both. The inner tube may be free to rotateindependently of the outer tube, the intermediate tube, or both. Theinner tube may extend through one or both ends of the outer tube, theintermediate tube, or both. The inner tube may have a grinding tip thatextends all of the way through the outer tube, the intermediate tube, orboth so that the grinding tip is exposed at 360 degrees. The inner tubemay connect with a coupling device that transfers power from the motorin the handpiece to the inner tube so that the inner tube rotates aroundan axis. The inner tube may be connected to and/or include a inner hub.

The inner hub may be any device that may assist in coupling the innertube to the motor, in rotating the inner tube, in forming a fixedconnection on the inner tube so that the inner tube is not displacedalong the longitudinal axis, or a combination thereof. The inner hub mayinclude one or more teeth for forming a rotatable connection with anadjacent component. One or more bias members may extend over all or aportion of the inner hub to assist is forming a connection, removing aconnection, ensuring that the connection remains secure, or acombination thereof. The bias member may be any bias member discussedherein. Preferably, the bias member is a spring. The bias member may belocated proximate to one or more seals. The one or more seals may be anyseal that prevents fluid leakage. The one or more seals may be locatedat an end of the inner hub, at an end of the inner tube, theintermediate tube, the outer tube, or a combination thereof so that afluid, surgical debris, irrigation fluids, or a combination thereof isprevented from leaking into the handpiece and is urged to extend throughthe tubes in the handpiece. The inner tube, the inner hub, or both mayextend through a encapsulation connector. The encapsulation connectormay assist in preventing lateral movement of the inner tube, theintermediate tube, the outer tube, or a combination thereof. Preferably,the inner tube extends through the encapsulation connector so that theencapsulation connector prevents lateral movement of the inner tube andmonitors rotation of the Inner tube. The encapsulation connector mayinclude two or more transmitters that are in magnetic communication withthe inner tube, the inner hub, the outer hub, or a combination thereof.Preferably, the two or more transmitters of the encapsulation connectormagnetically monitor the position of the outer hub and/or the window inthe outer tube, the intermediate tube, or both with respect to theposition of the window. Other teachings regarding the encapsulationconnector, the two or more transmitters, the magnetic communication, ora combination thereof may be gleaned from the teachings herein,including those Paragraph Nos. 008-0014 and 0035-0055; and FIGS. 2-14 ofU.S. patent application Ser. No. 13/251,493, filed on Oct. 3, 2011,incorporated by reference herein for all purposes regarding theencapsulation connector, the two or more transmitters, or the magneticcommunication. The encapsulation connector and the outer hub may belocated adjacent to each other, may cover all or a portion of theadjacent part, may form a sealed connection or a combination thereof.Alternatively, other teachings regarding rotating one or more of thetubes relative to each other may be gleaned from the teachings herein,including those of Paragraph Nos. 004-005, 0012-0038 and FIGS. 1A-4C ofU.S. patent application Ser. No. 13/796,412, filed on Mar. 12, 2013,incorporated by reference herein for all purposes regarding a lockselector, bias device, and an actuation selector.

The outer hub may fully and/or partially extend into a handpiece andassist in creating a fixed connection between the disposable blade and ahandpiece. The outer hub may be entirely located outside of thehandpiece. The outer hub may be any device that is fixedly connected tothe outer tube, the intermediate tube, or both. The outer hub may befixedly connected to the outer tube, the intermediate tube, or both sothat axial movement, relative to the axis of the outer hub, of the outertube, the intermediate tube, or both is substantially prevented,eliminated, or both. The outer hub may be any device that facilitatesrotational movement of one or more of the tubes during rotation of oneor more parts that are adjacent to the one or more tubes, connected tothe one or more tubes, or both. The outer hub may be fixedly connectedto an outer tube, a nosecone, or both so that upon rotation of thenosecone the outer tube is rotated by its connection with the outer hub.The outer hub may be fixedly connected to the outer tube, theintermediate tube, or both so that when the outer hub rotates the outertube, the intermediate tube, or both rotate. The outer hub may befixedly connected to the intermediate tube, the outer tube, or both sothat when the nosecone is rotated the intermediate tube, the outer tube,or both are rotated. The outer hub may extend into, extend around,extend into contact with, or a combination thereof one or more adjacentparts so that upon movement of the one or more adjacent parts the outerhub is rotated along with the outer tube, the intermediate tube, orboth. The outer hub may be rotated by a portion having an interfittingtorque transmitting piece.

The interfitted torque transmitting piece may be any device thattransfers a force, torque, or both from one component to anothercomponent. The interfitting torque transmitting piece may include ribs,teeth, a helically wrapped track, or a combination thereof. Theinterfitted torque transmitting piece may be smooth, free of teeth, freeof ribs, or a combination thereof. The interfitted torque transmittingpiece may be contacted and rotated by a belt, a pulley, a flat pliablematerial, or a combination thereof. Preferably, the interfitted torquetransmitting piece is a gear portion, a cog portion, a worm gearportion, an inner hub portion, or a combination thereof of the outerhub. Preferably, the interfitted torque transmitting piece of the outerhub may be a toothed portion.

The toothed portion may be any portion of the outer hub that is locatedjuxtaposed to one or more adjacent components that may contact thetoothed portion so that upon rotation of the one or more adjacentcomponents the toothed portion may rotate the outer hub. Preferably, aforward portion (e.g., distal portion that is axially located distalfrom the handpiece) of the outer hub includes a toothed portion having aplurality of teeth. The toothed portion may extend around all or aportion of a circumference of the outer hub so that the outer hub may beused to rotate an intermediate tube, an outer tube, or both. Preferably,the toothed portion may extend 360 degrees around the outer hub so thatthe outer tube, the intermediate tube, or both may be fully rotated in aclockwise direction, a counterclockwise direction, or both. The toothedportion may be contacted by one or a plurality of pinion gears.

The one or more pinion gears may be any device that may contact theinterfitted torque transmitting piece, the toothed portion, or both ofthe outer hub. The one or more pinion gears may be any gear that rotatesaround an axis and transfers torque, force, movement, or a combinationthereof from and/or to one or more adjacent surfaces, components,pieces, or a combination thereof. The one or more pinion gears may forma substantially a mirror image to the interfitted torque transmittingpiece, the toothed portion, or both so that one or more pinion gears andthe interfitted torque transmitting piece, the toothed portion, or bothform a rotational connection, an interconnection, or both fortransferring a force, torque, or both. The one or more pinion gears maybe sufficiently large so that the pinion gears rotate the intermediatetube, the outer tube, or both without the user having to reposition hisor her hand to complete a desired rotation. The one or more pinion gearsmay be sufficiently small so that the one or more pinion gears do notprevent one or more components from extending through the through holein the collet. The one or more pinion gears and the interfitted torquetransmitting piece, the toothed portion, or both may have a gearingratio. For example, one complete rotation of the one or more piniongears may rotate the outer hub 1 time thus having a gearing ratio of1:1. The gearing ratio may be any ratio so that upon movement of the oneor more pinion gears the outer hub is rotated a sufficient amount sothat a window in the outer tube, the intermediate tube, or both rotatesabout 60 degrees or more, about 90 degrees or more, about 120 degrees ormore, or about 180 degrees or more. The gearing ratio of the one or morepinion gears to the interfitted torque transmitting piece, the toothedportion, or both may be about 1:0.5 or more, about 1:0.7 or more, about1:1 or more, or about 1:1.2 or more. The gearing ratio of the one ormore pinion gears to the interfitted torque transmitting piece, thetoothed portion, or both may be about 1:5 or less, about 1:4 or less,about 1:3 or less, or about 1:2 or less. The tip may include asufficient number of pinion gears so that the outer hub is rotated inthe same direction as a user rotates. The tip may include an odd numberof pinion gears or an even number of pinion gears. Preferably, tipincludes an even number of pinion gears. More preferably, the tipincludes at least two pinion gears so that the outer hub is rotated inthe same direction as a user rotates a movable portion connected to theat least two pinion gears. The one or more pinion gears may be connectedto a collet.

The collet may extend partially and/or entirely into a handpiece andassist in creating a connection between the disposable blade and thehandpiece. The collet may form a fixed connection with the handpiece sothat the collet, the disposable blade, or both are free of rotationalmovement, lateral movement, longitudinal movement, or a combinationthereof. The collet may be any device that is stationary within themechanical enclosure. A blade module may be connected to the collet,around the collet, or both so that the blade module forms a stationaryconnection relative to the handpiece, the collet, or both. The colletmay be a stationary gripping portion for a user. The collet may form aframe for the tip, the mechanical enclosure, or a combination thereof.The collet may be any device that includes one or more through holes forone or more components to extend through. For example, one or moretubes, a slide lock, a lock lever, an outer hub, or a combinationthereof may extend through the collet. Preferably, at least the outerhub extends at least partially through the through hole in the collet.For example, the outer hub may include one or more seals around an outerperiphery that contact an inner surface of the collet so that the sealsform a sealed connection therebetween. The collet includes alongitudinal axis. The longitudinal axis may extend through a center ofthe collet, through a center of the through hole in the collet, or both.The through hole may extend through a center of the collet, may beoffset from center, or both. For example, the locking spline, the slidelock, the one or more tubes, or a combination thereof may be offset froman axis extending though the center of the collet. Preferably, however,the collet, the locking spline, the slide lock, and the one or moretubes are all concentric, aligned along the longitudinal axis of thecollet, or both. The outer hub and the collet may form a sealedconnection. The sealed connection between the collet and the outer hubmay allow for rotational movement of the outer hub relative to thecollet and maintain the sealed connection. Preferably, during use a usergrips the collet or a piece fixedly and/or rotatably connected to thecollet so that the user may rotate one or more adjacent parts,manipulate the disposable blade, perform a procedure, or a combinationthereof. The collet may include one or more connection surfaces so thatone or more adjacent parts discussed herein may be connected to thecollet. The collet may include one or more support pins for supportingthe one or more pinion gears.

The one or more support pins may be any device that provides rotationalsupport for the pinion gears. The one or more support pins may be one ormore axes, bearing surfaces, supports, or a combination thereof. The oneor more support pins may be any device that supports the one or morepinion gears in a low friction rotational movement. Preferably, the oneor more pinion gears may be connected to the collet via the one or moresupport pins. More preferably, the one or more pinion gears may berotationally movable relative to the collet but axially fixed to thecollet. For example, the one or more pinion gears may be fixed to thesupport pins so that they cannot slide along their rotational axis;however, the pinion gears are free to rotate around the rotational axis.The one or more pinion gears, the one or more support pins, or both maybe located at any position on the collet. Preferably, the one or moresupport pins, the one or more pinion gears, or both are located at adistal end of the collet (i.e., the end of the collet closest to thenosecone and farthest from the user). More preferably, the one or moresupport pins, the one or more pinion gears, or both may be locatedsubstantially out of the through hole opening so that one or morecomponents may pass through the through hole. Even more preferably, theone or more support pins, the one or more pinion gears, or both arelocated on the collet so that the one or more pinion gears connect tothe interfitted torque transmitting piece, the toothed portion, or bothof the outer hub located proximate to and/or extending through thethrough hole opening. The one or more pinion gears may form aconnection, an interfitted connection, a torque transfer connection, ora combination thereof with one or more nosepiece gears.

The one or more nosepiece gears may be any gear that transfers arotational force from a user to one or more of the tubes discussedherein. The one or more nosepiece gears may be any shape, size, orconfiguration so that upon movement of the nosecone, one or more thenosepiece gears move one or more adjacent disposable blade components.The nosepiece gear may be circular, oval, one or more adjoiningsegments, one continuous piece, or a combination thereof. The one ormore nosepiece gears may be an atlas gear, a planetary gear, a gear thatmay extend around an inside periphery of an adjacent component, thenosecone, or both. The one or more nosepiece gears may be fixedlyconnected, permanently connected, an integral part of, or a combinationthereof a nosecone of the disposable blade. The one or more nosepiecegears may form a connection with the nosepiece so that when a userrotates the nosepiece, the one or more nosepiece gears are rotated. Forexample, the nosepiece gear and the nosecone may be two discrete piecesthat are connected. In another example, the nosepiece gear may beintegrally formed in an interior of the nosepiece so that they are onepart. The one or more nosepiece gears may include one or more bumps, oneor more projections, or both that prevent rotation of the nosepiece gearindependent of the nosecone. The one or more nosepiece gears may extendpartially and/or fully around an inside, an outside, or both of thenosepiece. Preferably, the one or more nosepiece gears extend 360degrees around an inside of the nosepiece and form an interfittedconnection with the one or more pinion gears. The one or more nosepiecegears may be any device that may transfer torque, a rotational force, orboth to the one or more tubes, the outer hub, the pinion gears or acombination thereof either directly or indirectly. In one preferredexample, the nosepiece gear may connect with two pinion gears that areconnected to a toothed portion of the outer hub, which is connected toan intermediate tube, an outer tube, or both so that upon rotation ofthe nosecone the rotational force is transferred to the intermediatetube, the outer tube, or both so that a window in the intermediate tube,the outer tube, or both is oriented as desired. The one or morenosepiece gears may be a belt that may transfer torque, a rotationalforce, or both directly from the nosecone to the outer tube, theintermediate tube, or both. Preferably, the one or more nosepiece gearsinclude one or more teeth that form an interfitted connection with oneor more adjacent toothed gears. The one or more nosepiece gears and theone or more pinion gears may have a gear ratio. The gear ratio may beany ratio so that upon movement of the nosecone, the one or morenosepiece gears or both the outer tube, the intermediate tube or bothrotate about 60 degrees or more, preferably about 90 degrees or more,and more preferably about 120 degrees or more. The gear ratio of thenosepiece gear to the pinion gears may be about 1:1 or more, preferablyabout 1:1.5 or more, more preferably about 1:2 or more, and morepreferably about 1:2.5 or more. The gear ratio of the nosepiece gear tothe pinion gears may be about 1:10 or less, about 1:5 or less, or about1:3 or less. In one preferred example, each rotation of the nosepiecegear rotates the pinion gears about 2.5 times and the outer hub about 2times. Preferably, a nosecone includes only one nosepiece gear.

The nosecone may be any part of the disposable blade that rotates theorientation of the one or more tubes, rotates the one or more windows ofthe one or more tubes, or both. The nosecone may be any portion that maybe gripped by a user. The nosecone may be a distal most part of themechanical enclosure, may be the part of the mechanical enclosure thatis located closest to the patient, a piece that one or more andpreferably all of the tubes extend through, or a combination thereof.The nosecone includes a rotational axis. The nosecone and the nosepiecegear may have rotational ratio. The rotational ratio of the nosecone tothe nosepiece gear may be about 1:0.5 or more, preferably about 1:0.8 ormore, and more preferably about 1:1 or more. The rotational ratio of thenosecone to the nosepiece gear may be about 1:2 or less, about 1:1.5 orless, or about 1:1.2 or less. Preferably, the rotational ratio of thenosecone to the nosepiece gear is about 1:1. The nosecone may preventthe one or more tubes from laterally moving during use. For example, thenosecone may provide stability around the periphery of the one or moretubes so that the one or more tubes are substantially fixed in adirection transverse to the rotational axis of the one or more tubes.The nosecone may form a fixed connection directly and/or indirectly withone or more of the tubes. The nosecone may form a fixed connection withthe outer tube, the intermediate tube, or both so that rotation of thenosecone rotates the outer tube, the intermediate tube, or both.Preferably, in a three tube system the outer tube is fixedly and/orrotatably connected directly and/or indirectly to the nosecone. Thenosecone may include one or more complementary pieces that form aninterlock with a feature in the outer tube, the intermediate tube, orboth. The nosecone may include a tab that forms a fitted connection witha slot in the outer tube, the intermediate tube, or both. Preferably,the nosecone includes one or more locking splines.

The one or more locking splines may be any device that extends into thenosecone and forms a lockable connection with one or more adjacent partsof the disposable blade. The one or more locking splines may be directlyand/or indirectly connected to the nosecone. The one or more lockingsplines may be free of a fixed connection with the nosecone. Forexample, the nosecone may be rotatable independently of the lockingspline or vice versa. The one or more locking splines may be integrallyformed with the nosecone, may be fixedly connected to the nosecone, maybe removably connected to the nosecone, or a combination thereof. Theone or more locking splines may include a longitudinal axis and mayextend from the nosecone along the longitudinal axis. The one or morelocking splines may include a through hole that extends along thelongitudinal axis and the one or more tubes may extend through thethrough hole. The through hole may be planar, may be tapered, mayinclude a tapered portion, or a combination thereof so that axialmovement of the outer tube, the intermediate tube, or both through thenosecone, the locking spline, or both is minimized and/or substantiallyprevented. The through hole may be connected to a portion of the outertube, the intermediate tube, or both by a press fit connection, aninterference fit, a fastener, gluing, a taper, mechanical slot/spline,slip fit, or a combination thereof. Preferably, in a two tube system thenosecone is fixedly connected to the locking spline, the outer tube, theouter hub, or a combination thereof so that the nosecone, the lockingspline, the outer tube, the outer hub, or a combination thereof cannotbe moved independently of one another. More preferably, in a two tubesystem the outer tube is connected to the outer hub, and the lockingspline and outer hub are connected to the nosecone so that when theslide lock is engaged to the locking spline, the outer hub, and theouter tube are prevented from rotation. The one or more locking splinesmay include one or more tabs adjacent to the through hole.

The one or more tabs may be any feature that is complementary to one ormore slots in the outer tube, the intermediate tube, or both. The one ormore tabs may be any feature that assists in forming a fixed connection,prevents independent rotational movement, or both of the outer tube, theintermediate tube, or both relative to the nosecone, the locking spline,or both. The one or more tabs may extend into and/or through a portionof the outer tube, the intermediate tube, or both. The one or more tabsmay be located at a proximal end of the locking spline (i.e., an end ofthe locking spline most proximal to a user), partially and/or fullywithin the through hole, or both. Preferably, in the three tube systemthe outer tube includes slots and the locking spline includes tabs sothat the outer tube forms a fixed connection with the locking spline sothat the outer tube and the locking spline cannot be rotatedindependently, and the nosecone and the locking spline are free of aconnection so that the nosecone and locking spline may be independentlyrotated. The locking spline may include one or more ribs.

The one or more ribs may be any feature that prevents independentrotational movement of a complementary part, the nosecone, or both. Theone or more ribs may be sufficiently sized and spaced so that acomplementary part forms a fixed connection with the locking spline sothat independent rotational movement is prevented. Preferably, the oneor more ribs are located on an outer periphery of the locking spline.The one or more ribs may extend in an axial direction relative to therotational axis of the one or more tubes, parallel to the rotationalaxis, or both. The one or more ribs may be disposed around acircumference of the locking spline. The one or more ribs may be spacedapart so that a portion of a complementary part may extend between theone or more ribs and form a fixed connection. The one or more ribs mayinclude a tapered portion that assists in creating a fixed connectionwith a complementary part, assists in aligning the ribs with one or morecorresponding ribs and/or teeth on a complementary part, or both. Thetapered connection preferably may be located at a proximate portion sothat a complementary part may slide over the locking spline to form aconnection and the distal portion of the locking spline remains incontact with the nosecone. The complementary part may be any part thatmay move into contact with and form a fixed connection with the lockingspline so that the locking spline is immobilized during the fixedconnection. Preferably, the complementary part is a slide lock.

The slide lock may be any part of the disposable blade that may be movedaxially along the rotational axis of the one or more tubes, thelongitudinal axis of the locking spline, or both so that when engagedwith the locking spline rotational movement is prevented and/orsubstantially eliminated of one or more adjacent parts. The slide lockmay include one or more teeth and preferably a plurality of teeth. Theone or more teeth may correspond with the one or more ribs in thelocking spline so that the teeth and ribs form an alternatingconfiguration. The one or more teeth and the one or more ribs may form afixed connection that prevents rotational movement, forms a lockedstate, or both. One or more tubes may extend through a through hole inthe slide lock. The slide lock may be any device that may be movedbetween and form a locked position or locked state, an unlocked positionor unlocked state, or both. The slide lock may move within the collet,into and out of the collet, along an axis of the collet, besubstantially housed within the collet, or a combination thereof. Theslide lock and collet may form a mating relationship so that the colletprevents rotational movement of the slide lock in a locked position, anunlocked position, or both. The slide lock may have one or more railsthat slide within one or more corresponding tracks in the collet.

The one or more rails may be any feature of the slide lock that may forma connection with an adjacent piece of the tip so that rotation aroundthe one or more tubes is prevented. The one or more rails may be a pieceof the slide lock that extends from the slide lock and forms a ridge, ashoulder, an extended surface, or a combination thereof that contacts anadjacent ridge, shoulder, extended surface, or a combination thereof ofan adjacent part so that rotational movement of the two parts relativeto each other is substantially limited and/or prevented. Preferably, theone or more rails may have an upper surface and a lower surface thatextend between and into a track formed in the collet. The one or morerails may be an extension from the slide lock. The one or more rails maybe any size and shape so that the rails form a fixed connection with anadjacent part. The one or more rails may be square, rectangular, round,oval, diamond, symmetrical, asymmetrical, ribbed, planar, non-planar,geometric, non-geometric, or a combination thereof. Preferably, theslide lock includes at least two generally rectangular rails that aresubstantially parallel so that the rails assist in sliding the slidelock along the axis of the one or more tubes and prevent rotationalmovement of the slide lock around the axis. The track may be any surfacewithin and/or along the collet that may include an upper surface and alower surface that forms a ridge, a shoulder, an extended surface, or acombination thereof. The collet may include one or more tracks,preferably two or more tracks, and most preferably three tracks. The oneor more tracks may be a recess and/or a through hole in an internal sidewall, an external sidewall, or both of the collet. The one or moretracks may be an absence of material in a sidewall of the collet thatone or more of the tracks extends into, through, or both. The one ormore tracks may be a combination of a through hole, a recess, and asliding surface that assists in preventing rotational movement of theslide lock relative to the collet. The one or more tracks may be anyshape, size, and configuration that substantially mirrors the shape,size, and configuration of the rails so that the rails slide axiallyalong the tracks and the tracks prevent rotational movement around theaxis of the one or more tubes. One of the one or more rails may be anactuation connection.

The actuation connection may be any part of the slide lock that forms aconnection with a lock lever so that a user can actuate the lock leverto axially move the slide lock. The actuation connection may be fixedlyconnected, rotatably connected, removably connected, or a combinationthereof to the slide lock. The actuation connection may connect with thelock lever so that the lock lever may move the slide lock axially intoconnection with the locking spline. The actuation connection may includeone or more features that may be pushed and/or pulled by the lock leverso that the slide lock is moved. All or a portion of the actuationconnection may be flat, angled, tapered, or a combination thereof sothat during locking and/or unlocking the lock lever slides within theactuation connection.

The lock lever may be any device that has a portion that is internal ofthe mechanical enclosure and a portion that is external of themechanical enclosure so that a user can lock and unlock the position ofthe outer tube, the intermediate tube, the inner tube, or a combinationthereof for rotational movement. The lock lever may include one or moreshoulders that connect to the actuation connection, a portion of theblade module, or both. The lock lever may pivot around the one or moreshoulders forming a locked position and an unlocked position. Themechanical enclosure may include a seat that holds one or both of theshoulders. The mechanical enclosure may include a blade module and thelock lever may extend through a portion of the blade module so that aportion of the lock lever is exposed for actuation by a user. The blademodule may include a control enclosure and a connection enclosure andthe lock lever may extend through and/or be connected to one or both ofthe control enclosure and the connection enclosure. Preferably, the locklever is in communication with and extends through a portion of thecontrol enclosure. The control enclosure may include one or more throughholes so that the lock lever may extend through into and intocommunication with the slide lock. The lock lever may include a hookthat connects the lock lever to the actuation connection. The lock levermay include a locking tab. The locking tab may be any part of the locklever that holds the lock lever in a locked position or locked state, anunlocked position or unlocked state, or both. Preferably, the lockingtab forms a secure connection to the mechanical enclosure so that duringuse rotation of the outer tube, the intermediate tube, the inner tube,or a combination thereof changing the direction of the angled portion isprevented. For example, when the lock lever is in the locked state thenosecone may rotate the intermediate tube, and the inner tube may rotateso that cutting may be performed, but the rotation of the angled portionof the outer tube, the intermediate tube, and the inner tube around thelongitudinal axis may be prevented so that the orientation remainsconstant. More preferably, the locking tab forms a secure connection toa locking feature on the connection enclosure so that lock lever issecured when the lock lever is in the locked position, the unlockedposition, or both. The connection enclosure, the control enclosure, orboth of the blade module may be located at any location within themechanical enclosure. The control enclosure may include one or moreelectrical parts (i.e., circuitry), one or more mechanical parts, orboth. The interchangeable tips may include mechanical functionalityincluding a stylet, one or more connecting tabs, a drive attachment, ora combination thereof so that the mechanical functionality may performone or more of the procedures discussed herein. The interchangeable tipmay include an enclosure that houses the circuitry. Other teachingsregarding the blade circuitry, connectors, identification circuits,control circuits, connectors, or a combination thereof may be gleanedfrom the teachings herein, including those of Paragraph Nos.; 5-9 and0024-0053 and FIGS. 1-7D and corresponding verbal description inparagraphs 0054-0064 of U.S. patent application Ser. No. 13/803,380,filed on Mar. 14, 2012, incorporated by reference herein for allpurposes regarding the blade circuitry, connectors, identificationcircuits, control circuits, connectors, detection circuits, or acombination thereof, all of which may be incorporated into themechanical enclosure.

The mechanical enclosure may be any device that houses one or moremoving parts of the disposable blade. The blade module may be a fixedportion that the user grips. The blade module may be fixed relative tothe nosecone. The mechanical enclosure may include one or morefunctional buttons. Preferably, the blade module includes at least acontrol enclosure and a connection enclosure that form a portion of themechanical enclosure. More preferably, the connection enclosure includesa seat that forms a movable connection, a pivotable connection, or bothwith the lock lever so that the lock lever may be moved between a lockedposition and an unlocked position. The lock lever may move axiallyforward in the distal direction and pivot around the seat of theconnection enclosure as the lock lever is moved backwards in theproximal direction. For example, in a locking sequence the lock levermay “teeter totter” (i.e., one end may move in a first direction and theopposing end may move in the opposite direction). The lock lever may beactuated by a bias member when a connection between the locking tab andthe locking feature is removed.

The one or more bias members may be located at any location within themechanical enclosure so that that bias member assists in moving theslide lock, the lock lever, or both from a locked position to an unlockposition, or vice versa. The bias member may be any member that assistsin moving the slide lock to the unlock position, towards a proximal endof the disposable blade, away from the locking spline, or a combinationthereof. The bias member may move the slide lock along the longitudinalaxis of the locking spline; the rotational axis of the outer tube, theintermediate tube, the inner tube, or a combination thereof; thelongitudinal axis of the collet, the longitudinal axis of the outer hub,or a combination thereof. The bias member may be a spring, a piece ofrubber, the like, or a combination thereof that assists in moving theslide lock, the lock lever, or both. Preferably, the bias member extendsover the locking spline so that when the slide lock extends over thelocking spline the bias member is compressed between the nosecone andthe slide lock and presses against the slide lock. The bias member mayextend over the locking spline and one or more shims.

The one or more shims may be located between the locking spline and thenosecone and may assist in axially spacing the locking spline from thenosecone, preventing a fixed connection between the locking spline andthe nosecone, or both. The one or more shims may only be used in the twotube system or the three tube system.

FIG. 1 illustrates a disposable blade 2 has tip 4 that is angled. Thetip 4 is connected to a mechanical enclosure 8. The mechanical enclosureincludes a blade module 70 for housing components of the disposableblade 2.

FIG. 2 illustrates a disposable blade 2 has a tip 4 with an angledportion 6 and a window 10. The tip 4 is connected to a mechanicalenclosure 8. The mechanical enclosure includes a blade module 70 forhousing components of the disposable blade 2. The tip 4 has a rotationalaxis 100 that conforms to the shape of the angled portion 6 so that thetip 4 along its length rotates around the rotational axis 100.

FIGS. 2A and 2B illustrate an exploded view of the disposable blade ofFIG. 2 in a locking position. The tip 4 includes an outer tube 20 and aninner tube 24. Both the outer tube 20 and the inner tube 24 include anangled portion 6. The tip 4 connects to the mechanical enclosure 8 byextending through the nosecone 30. The nosecone 30 includes a shim 32(not shown) for axially spacing the locking spline 34 and biasing member40 within the nosecone 30. A slide lock 44 is in communication with alock lever 52. The lock lever 52 is used to move the slide lock 44between a locking position (as shown in FIG. 2A) and a non-lockedposition (as shown in FIG. 2B). When the lock lever 52 is moved to thelock position, the lock lever 52 pushes the slide lock 44 over thelocking spline 34 so that ribs 36 on the locking spline 34 are engagedwith teeth 48 (not shown) on the slide lock 44. An optional nosepiecegear 42 extends into the nosecone 30 and extends around the slide lock44. The nosecone 30 when rotated rotates a window 10 (not shown) in thetip 4. The collet 54 covers an outer hub 60 that rotates duringoperation of the disposable blade. A control enclosure 72 and aconnection enclosure 74 form an enclosure behind the nosecone 30. Atleast a portion of the slide lock 44 and assist in supporting the locklever 52. At least a portion of the outer hub 60 extends beyond thecontrol enclosure 72 and the connection enclosure 74 so that the outerhub 60 assists in forming a connection with a motor (not shown). A ring82 is located in an end region of the outer hub 60 and assist in sealingthe tip. As is illustrated in FIG. 2A the bias member 40 is compressedby the lock lever 52 being retracted into the lock position, and in FIG.2B the bias member 40 is extended to assist in moving the slide lock 44back when the lock lever is released into an unlocked position.

FIG. 3 illustrates a disposable blade 2. The disposable blade includes atip 4 connected to a mechanical enclosure 8. The tip 4 includes anangled portion 6, and the mechanical enclosure includes a blade module70.

FIGS. 3A and 3B illustrate an exploded view of the disposable blade ofFIG. 3. The tip 4 comprises an outer tube 20, an intermediate tube 22,and an inner tube 24. The intermediate tube 22 includes a window 10 thatexposes the inner tube 24. The tip 4 connects to the mechanicalenclosure 8 by extending through the nosecone 30. The nosecone 30includes a shim 32 (not shown) for axially spacing the locking spline 34and biasing member 40 within the nosecone 30. A slide lock 44 isconnected to a lock lever 52 by an actuation connection 46. The locklever 52 is used to move the slide lock 44 between a locking position(as shown in FIG. 3A) and a non-locked position (as shown in FIG. 3B).When the lock lever 52 is moved to the lock position, the lock lever 52pushes the slide lock 44 over the locking spline 34 so that ribs 36 onthe locking spline 34 are engaged with teeth 48 (not shown) on the slidelock 44. When the lock lever 52 is in the locked position the tip 4 islocked in place so that the angled portion 6 of the tip points in asingle direction. When the lock lever 52 is released the tip 4 can berotated so that the angled portion 6 is adjusted and the angled portioncan be angled towards a point of interest. A nosepiece gear 42 extendsinto the nosecone 30 and extends around the slide lock 44. Duringrotation of the nosepiece 30, the nosepiece gear 42 is rotated and thenosepiece gear 42 rotates a pair of pinion gears 50 so that a window 10in intermediate tube 22 is directionally rotated towards a point ofInterest. The window 10 can be rotated when the lock lever 52 is in thelocked position (FIG. 3A) or the unlocked position (FIG. 3B). The piniongears 50 are connected to a stationary collet 54. The collet 54 coversan outer hub 60 which rotates during operation of the disposable blade.A control enclosure 72 and a connection enclosure 74 form an enclosurebehind the nosecone 30 and at least a portion of the slide lock 44 andassist in supporting the lock lever 52. At least a portion of the outerhub 60 extends beyond the control enclosure 72 and the connectionenclosure 74. As is illustrated in FIG. 3A the bias member 40 iscompressed by the lock lever 52 via the sliding lock 44 being retractedinto the lock position, and in FIG. 3B the bias member 40 is extended toassist in moving the slide lock 44 back when the lock lever is releasedinto an unlocked position.

FIG. 4 is an exploded view illustrating additional features of adisposable blade 2. A nosecone 30 includes a shim 32, a locking spline34 that has a plurality of ribs 36, and a biasing member 40. An outertube 20 is connected to and extends through the locking spline 34. Thebiasing member 40 extends between the locking spline 34 and the slidelock 44 and assists in moving the slide lock 44. The slide lock 44includes an actuation connection 46 that connects to a lock lever 52that moves the slide lock 44. The slide lock 44 extends through anosepiece gear 42 when the lock lever 52 is actuated from an unlockedposition to a locked position so that the slide lock 44 slides over thelocking spline 34. The nosepiece gear 42 has teeth 48 around an insideperiphery that connect with teeth 56 of the pinion gears 50. The piniongears 50 are connected to the collet 54 via a bearing surface, whichconnects to a handpiece (not shown) so that the collet 54 assists infixedly connecting the disposable blade 2 to the handpiece. A portion ofthe collet 54 is surrounded by the control enclosure 72 and theconnection enclosure 74. The connection enclosure 74 includes a hole(not shown) that the lock lever 52 extends through and locks unto sothat the lock lever 52 maintains a locked position. An intermediate tube22 including a window 10 extends through the collet 54, the slide lock44, the locking spline 34, and the nosecone 30. The intermediate tube 22is connected to the outer hub 60. The outer hub 60 includes a toothedportion 62 that is indirectly connected to the nosepiece 30. Rotationalenergy is transferred from the nosepiece 30 through the nosepiece gear42 and the pinion gears 50 to the toothed portion 62 of the outer hub 60so that the window 10 of the intermediate tube 22 is rotated to adirection of interest. A encapsulation connector 90 is connected to anend region of the outer hub 60. Two rings 82 are located on the outerhub 60 so that the connection to the collet 54 is sealed. Theencapsulation connector 90 assists in holding the inner tube andincludes two transmitters 92 that are in magnetic communication with twomagnets 84 located in the inner hub 94 and a magnetic sensor (not shown)in the reusable handpiece. These, magnets in conjunction with softwarein a console, allows the user to toggle between an open and closed innerblade window regardless of the rotational position of the outermostwindow-carrying tube. The inner tube 24 extends into and through theencapsulation connector 90 and the intermediate tube 22. An end regionof the inner tube 24 includes an inner hub 94 that connects the innertube to coupler (not shown) that is connected to a motor (not shown) ina handpiece (not shown). The inner hub 94 extends at least partiallyinto the encapsulation connector 90. The inner hub 94 includes a biasingmember 40 and a coupling seal 96 so that the inner hub 94 is removablysealed and connected to a coupler of a handpiece. The outer tube 20, theintermediate tube 22, and the inner tube 24 extend along a commonrotational axis 100. As illustrated, the rotational axis 100 of thetubes is also the longitudinal axis 102 of the locking spline 34.

FIG. 5 illustrates an exploded view of the mechanical enclosure 8. Theenclosure 8 includes a control enclosure 72 and a connection enclosure74 that surround a portion of the collet 54. The connection enclosure 74includes a hole (not shown) so that the lock lever 52 can extend throughand connect with the actuation connection 46 and move the slide lock 44.The slide lock 44 includes rails 64 that move along tracks 55 in thecollet 54 so that the tracks 55 prevent rotational movement of the slidelock 44. The nosepiece gear 42 is connected to an end of the collet 54.The nosecone 30 houses the locking spline 34 which is covered by abiasing member 40 that assists in retracting the slide lock 44 when thelock lever 52 is moved from a locked position to an unlocked position.

FIG. 6 illustrates the nosepiece gear 42. The nosepiece gear 42 includesteeth 43 around an inside periphery. The teeth 43 of the nosepiece gear42 correlate to teeth 56 on the pinion gears 50 so that when thenosecone 30 (not shown) is rotated the nosepiece gear 42 rotates thepinion gears 50. The pinion gears 50 are connected to the collet 54 sothat the pinion gears remain stationary. The slide lock 44 slidesthrough the nosepiece gear 42 so that teeth 48 on the inside contact alocking spline 34 (not shown). The slide lock 44 is moved by a locklever 52 that rests in a seat 76 of a control enclosure 72.

FIG. 7 illustrates an exploded view of the components of the nosecone30. The nosecone 30 includes a shim 32 with a locking spine 34 connectedto the nosecone 30. The locking spline 34 includes ribs 36 that form afixed connection with a slide lock 44 (not shown). A bias member 40 fitsbetween the slide lock 44 (not shown) and the shim 32 and assists inretracting the slide lock 44 (not shown).

FIG. 8 illustrates the locking spline 34 connected to the nosecone 30.The locking spline 34 includes ribs 36. The outer hub 60 is free of atoothed portion and the area free of the toothed portion extends intothe nosecone 30.

FIG. 9 illustrates the nosepiece gear 42 fit into the nosecone 30. Theslide lock 44 is extending from the collet 54. Pinion gears 50 areconnected to the collet 54, and the track 55 extending along thelongitudinal axis of the collet 54.

FIG. 10 illustrates the collet 54 supporting the pinion gears 50. Thepinion gears 50 are offset so that pinion gear 50B forms a rotationalconnection with nosepiece gear 42. Pinion gear 50B forms a connectionwith pinion gear 50A so that rotational forces are transferred betweenpinion gear 50A and 50B. Pinion gear 50A forms a rotational connectionwith the toothed portion 62 of the outer hub 60 so that a rotationalforce is transferred from the pinion gear 50A to the outer hub 60. Auser rotates an window 10 (not shown) by rotating a nosecone 30 (notshown) that rotates the nosepiece gear 42, the nosepiece gear 42 rotatesthe pinion gear 50B and the pinion gear 50B rotates the pinion gear 50A,which then rotates the outer hub 60, which rotates a window 10 (notshown). The slide lock 44 extends partially out of the collet 54 so thatthe rails 64 of the slide lock 44 are extended into the tracks 55 in thecollet 54 and rotational movement of the slide lock 44 is prevented. Theslide lock 44 includes teeth 48 for connecting to ribs 36 on the lockingspline 34.

FIG. 11 illustrates the connections of each of the rotational componentsso that a window 10 (not shown) can be rotated to a point of interest.The outer hub 60 has a toothed portion 62 that extends into a nosepiecegear 42 and into contact with one of the two pinion gears 50A and 50B.When a nosecone 30 (not shown) is rotated the rotational forces aretransferred to the nosepiece gear 42. The nosepiece gear 42 includesteeth 43 that rotate and transfer the rotational energy to the teeth 56of the first pinion gears 50A. The first pinion gear 50A teeth 56transfer the rotational energy to the second pinion gear 50B. The teeth56 of the second pinion gear 50B are in rotational connection with thetoothed portion 62 of the rotary outer hub 60 that is connected to theintermediate tube 22 in a three tube system or the outer tube 20 in atwo tube system. The teeth 56 on the first pinion gear 50A are free ofdirect communication (i.e., include a clearance) with the toothedportion 62 of the inner hub 60. The teeth 56 on the second pinion gear50B are free of direction communication (i.e., include a clearance) withthe teeth 43 on the nosepiece gear 42.

FIG. 12 illustrates the nosecone 30 including a biasing member 40 andthe locking spline 34. The locking spline 34 is connected to an end ofthe outer tube 20. The end of the outer tube 20 includes slots 26 thatfit with corresponding tabs 28 in the locking spline 34 so that rotationof the outer tube 20 is prevented when in the lock lever (not shown) isin the locked position.

FIG. 13 illustrates the locking spline 34 extended down the outer tube20 so that an end of the outer tube 20 is exposed. The outer tube 20includes slots 26 that couple to tabs 28 of the locking spline 34 sothat movement of the outer tube 20 is prevented when the device islocked.

FIG. 14 illustrates the slide lock 44 connected to the locking spline34. The ribs 36 of the locking spline 34 are tapered so that the teeth48 of the slide lock 44 slides into a fixed connection when the deviceis locked. The slide lock 44 compresses the bias member 40. The slidelock 44 includes an actuation connection 46 that couples to the locklever 52 (not shown) for moving the slide lock 44.

Any numerical values recited herein include all values from the lowervalue to the upper value in increments of one unit provided that thereis a separation of at least 2 units between any lower value and anyhigher value. As an example, if it is stated that the amount of acomponent or a value of a process variable such as, for example,temperature, pressure, time and the like is, for example, from 1 to 90,preferably from 20 to 80, more preferably from 30 to 70, it is intendedthat values such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 etc. areexpressly enumerated in this specification. For values which are lessthan one, one unit is considered to be 0.0001, 0.001, 0.01 or 0.1 asappropriate. These are only examples of what is specifically intendedand all possible combinations of numerical values between the lowestvalue and the highest value enumerated are to be considered to beexpressly stated in this application in a similar manner.

Unless otherwise stated, all ranges include both endpoints and allnumbers between the endpoints. The use of “about” or “approximately” inconnection with a range applies to both ends of the range. Thus. “about20 to 30” is intended to cover “about 20 to about 30”, inclusive of atleast the specified endpoints.

The disclosures of all articles and references, including patentapplications and publications, are incorporated by reference for allpurposes. The term “consisting essentially of” to describe a combinationshall include the elements, ingredients, components or steps identified,and such other elements ingredients, components or steps that do notmaterially affect the basic and novel characteristics of thecombination. The use of the terms “comprising” or “including” todescribe combinations of elements, ingredients, components or stepsherein also contemplates embodiments that consist essentially of theelements, ingredients, components or steps. By use of the term “may”herein, it is intended that any described attributes that “may” beincluded are optional.

Plural elements, ingredients, components or steps can be provided by asingle integrated element, ingredient, component or step. Alternatively,a single integrated element, ingredient, component or step might bedivided into separate plural elements, ingredients, components or steps.The disclosure of “a” or “one” to describe an element, ingredient,component or step is not intended to foreclose additional elements,ingredients, components or steps.

It is understood that the above description is intended to beillustrative and not restrictive. Many embodiments as well as manyapplications besides the examples provided will be apparent to those ofskill in the art upon reading the above description. The scope of theteachings should, therefore, be determined not with reference to theabove description, but should instead be determined with reference tothe appended claims, along with the full scope of equivalents to whichsuch claims are entitled. The disclosures of all articles andreferences, including patent applications and publications, areincorporated by reference for all purposes. The omission in thefollowing claims of any aspect of subject matter that is disclosedherein is not a disclaimer of such subject matter, nor should it beregarded that the inventors did not consider such subject matter to bepart of the disclosed inventive subject matter.

We claim:
 1. A blade assembly comprising: a. a tip including two or moretubes, wherein the two or more tubes include at least: i. an outer tubeand ii. an inner tube; and b. a mechanical enclosure including: i. alocking spline having a longitudinal axis; and ii. a slide lock that ismovable between a locked position and an unlocked position within themechanical enclosure; wherein the slide lock moves between the lockedposition and the unlocked position along the longitudinal axis of thelocking spline, and the slide lock in the locked position extends overthe locking spline forming a locked state where the locking spline islocated within the slide lock so that rotational movement of the lockingspline, around the longitudinal axis of the locking spline, isprevented; and wherein the outer tube is coupled to the locking splineso that rotational movement of the outer tube, around the longitudinalaxis of the locking spline, is prevented during the locked state.
 2. Theblade assembly of claim 1, wherein the slide lock includes an actuationconnection that connects the slide lock to a lock lever that moves theslide lock between the locked position and the unlocked position.
 3. Theblade assembly of claim 1, wherein the mechanical enclosure includes acontrol enclosure and a connection enclosure that at least partiallycover the slide lock.
 4. The blade assembly of claim 3, wherein a locklever extends through the connection enclosure so that the lock lever isexposed for actuation by a user, and the lock lever moves the slide lockbetween the locked position and the unlocked position.
 5. The bladeassembly of claim 1, wherein at least one of the two or more tubesextend through the slide lock, and wherein the outer tube includesslots.
 6. The blade assembly of claim 5, wherein the locking splineincludes tabs that correspond to the slots in the outer tube so that theouter tube and the locking spline form a fixed connection.
 7. The bladeassembly of claim 1, wherein the locking spline includes one or moreribs, and wherein the slide lock includes one or more teeth, and whereinthe one or more ribs are tapered at one end.
 8. The blade assembly ofclaim 7, wherein the one or more teeth correspond with the one or moreribs of the locking spline so that when the slide lock slides over thelocking spline in the locked state the one or more ribs and the one ormore teeth form a fixed connection and prevent rotation of the outertube, the locking spline, or both.
 9. The blade assembly of claim 1,wherein the slide lock is housed in a collet, and the collet extendsinto a handpiece and assists in connecting the blade assembly to thehandpiece.
 10. The blade assembly of claim 9, wherein the collet isfixed to the handpiece so that the collet is free of rotationalmovement, lateral movement, longitudinal movement, or a combinationthereof.
 11. The blade assembly of claim 1, wherein the at least twotubes of the tip are three tubes, and the outer tube is a rigid sheaththat forms a bend so that an intermediate tube and the inner tubelocated within the outer tube are bent at an angle.
 12. The bladeassembly of claim 1, wherein a biasing member is located between thelocking spline and the slide lock and the biasing member assists inmoving the slide lock between the locked position and the unlockedposition.
 13. The blade assembly of claim 1, wherein the locking splineis connected to a nosecone.
 14. The blade assembly of claim 1, whereinthe blade assembly includes a nosecone and the locking spline and thenosecone are separated by a shim.
 15. A blade assembly comprising: a. atip including three or more tubes, wherein the three or more tubesinclude at least: i. an outer tube; ii. an inner tube; and iii. anintermediate tube located at least partially between the inner tube andthe outer tube; and b. a mechanical enclosure including: i. a noseconelocated distal to a collet and the three or more tubes extending distalof the nosecone, the nosecone including a nosepiece gear; ii. the collethaving one or more pinion gears that are in communication with thenosepiece gear; wherein the intermediate tube is connected to an outerhub that extends though the collet, the outer hub including a toothedportion that is in communication with the one or more pinion gears sothat rotation of the nosecone causes rotation of the intermediate tuberelative to the outer tube; wherein the outer tube is connected to alocking spline, and the locking spline assists in preventing rotation ofthe outer tube.
 16. The blade assembly of claim 15, wherein the one ormore pinion gears are two pinion gears so that the intermediate tuberotates in the same direction as the nosecone.
 17. The blade assembly ofclaim 15, wherein the intermediate tube includes a window that exposesat least a portion of the inner tube, and wherein the inner tube rotatesindependently of the intermediate tube, the outer tube, or both.
 18. Theblade assembly of claim 15, wherein the nosecone and the nosepiece gearare two pieces or the nosepiece gear is integrally formed in thenosecone.
 19. The blade assembly of claim 15, wherein the blade assemblyincludes a slide lock and rotation of the locking spline is preventedwhen the slide lock is moved from an unlocked position to a lockedposition.